trophic pyramid [image]

Figure 7: A simple trophic pyramid demonstrates the loss of energy (kilo calories, or biomass) from one tropic level to the next. Depicted as a pyramid, we can see that the primary producers or photosynthesizing autotrophs, make up the base of most food webs. As energy is transferred up the pyramid toward the top carnivores, approximately 90% is lost at each level, and only 10% is converted into biomass of the next higher trophic level.1

  • 1.

    Adapted by Philip Nahlik, Chris Wolff from Biological Science by Freeman, 2008 Pearson Education, Inc.